#include<bits/stdc++.h>
using namespace std;


const int N=51;
int rk[N][N];
bool o[N];

int main() {

    int T,n,i,j,k,wolf,live;
    cin>>T;
    while (T--) {
        cin>>n;
        live=n;
        for (i=1;i<=n;i++) {
            o[i]=true;
            cin>>j;
            if (j) wolf=i;
        }
        for (i=1;i<=n;i++)
            for (j=1;j<=n;j++)
                cin>>rk[i][j];

        
        k=rk[wolf][1];
        if (k==wolf)
            cout<<"lieren"<<endl;
        else {
            while (true) {
                o[k]=false;
                live--;
                if (live<=2) {
                    cout<<"langren"<<endl;
                    break;
                }
                for (j=1;j<=n;j++)
                    if (o[rk[k][j]])
                        break;
                if (rk[k][j]==wolf) {
                    cout<<"lieren"<<endl;
                    break;
                }
                k=rk[k][j];
            }
        }
        
    }

    return 0;
}